What size of TWM Throttle body to use?

[Dennis Kalma]

Hi, just doing the planning for my next engine. It will be based on a 930/03 case, using the 98 mm Mahle P/C combo with the stock SC crankshaft, S cams. Car will be dual plugged and will have SSI exhaust, single outlet muffler.

Car will be a street machine, perhaps occasional track days, but will primarily be used for touring around in my "twilight years" which are rapidly approaching.

Intent is to use the TWM "Weber carburetor replacement" throttle bodies along with something like a TEC 3 engine management system.

Any advice as to the proper diameter of throttle bodies to select for best all around performance?

Thanks

Dennis

[jgparker]

Wow, that TWM throttle body set-up looks great. Can I ask how much you expect the TWM TB plus the TEC3 FI to cost?

Thanks,

JP

[jgparker]

This is what I was looking at:

http://www.twminduction.com/ThrottleBody/ThrottleBody3006-FR.html

[Bill Verburg]

Sounds like a very nice setup, wish I knew the answer but keep us apprised.

[campbellcj]

Richard Clewett would be good to chat with re. your planned setup. He sells the parts and should have a good idea of what works well with what engines.

http://www.clewett.com/

No affiliation, just passing along the info...

[TimT]

heres mine (shameless pic plug)




sizing isnt as critical with throttle bodies as with carbs...no venturi

44 should be fine...if not 48's.. last time I talked with TWM the 44's were a few weeks until they made some more..

[Dennis Kalma]

I guess I was planning on using the 3003 series which is at - http://www.twminduction.com/ThrottleBody/ThrottleBody3006-FR.html - which says they are available in 40, 44, 46 and 48 mm sizes. The inidividual throttle body set up is indeed gorgeous, but more than what I need and definitely more pricey...although sizing ought to be the same.

[Wayne 962]

Use the 46s. For street driving, they might even be too big, but they are the smallest you can get.

-Wayne

[TimT]

but they are the smallest you can get.

errrrrr NO

available sizes 40,44,46,48

Ordering Guide
Order by Series number, bore size and whether left or right example: 3003-4403/L where 3003 is the Series, 44 is the bore size in mm, 3 is the number of injectors, left indicates shaft without TPS drive.

Throttle sizes available 40, 44, 46 48 mm

Please note the 3003 Series is the only TWM throttle body where 'left' does not indicate the switch drive unit.

Everytime I talk to TWM its like im talking to crocodile dundee, kinda like the motec or Link folks...

all of the above are from the same castings..

[jriera]

Dennis, take also a look at this company http://www.jenvey.co.uk, the price seems reasonable.. and they have a couple of distributors in Canada...

My next year (or so) project goes along the same lines as yours... but I will be using the MegaSquirt engine management.

Keep us posted!!

regards

[Wayne 962]

The 3006 featured in the link (which I was referring to) above is only available in 46mm.

-Wayne